La ciencia observa english
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La ciencia observa english

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Prsesentación sobre cómo la ciencia lee e interpreta el Universo

Prsesentación sobre cómo la ciencia lee e interpreta el Universo

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La ciencia observa english La ciencia observa english Presentation Transcript

  • Unit 1
      • Science watches and measures the Universe
  • What is the Universe?
      • The Universe is everything existing
      • Everything existing in the Universe only can be
      • matter or energy
  • What is matter?
    • Matter is everything that takes up space and has mass
  • What is energy?
      • Energy is everything that can work
  • What is Sciencie?
    • Science is the knowledge based on observation, experimentation and logic reasoning.
    • The scientific method is the way Science works: watching, measuring, predicting, checking...
  • What is ”to measure”?
    • T he properties of matter that can be measured are called magnitudes
    • Ejemplos: length, volume, surface area,...
    • Base Magnitudes define themselves. Example: length .
    • Derived Magnitudes are defined from a combination of the base magnitudes. Example: speed.
  • To measure is to compare a propertie of an object with a standard
    • The unit of measurement is a reference or standard.
    • Example: the metre .
    • The measure instrument counts how many times are the standards in the object.
    • Example: tape measure .
  • The International System of Measurements
  • Multiples and submultiples
  • Derived units
      • The derived units are obtained from a combination of the base units. They are used to measure surface area, volume, speed, density, etc. These units are the square metre, cubic metre, metre per second, etc.
  • Properties of matter : Mass
    • The mass is the amount of matter in a body.
  • Weight
    • Weight is the force generated by the gravitational attraction of the Earth on a body.
  • Volume
    • Volume is the amount of space occupied by an object.
  • Surface Area
    • The surface area is the space occupied by the length and width of a body.
  • Density
    • The density is the relationship between the mass and the volume of a body, that is, how concentrated the mass is in a specific volume.
    d = m/v
  • What is matter made off?
    • All matter is made up of atoms .
    • An atom is the smallest particle of matter which can exist alone.
  • The structure of an atom
    • Proton
    • Electron
    • Neutron
    • Quarks
  • How are atoms organised?
    • Molécules : are made up of two or more atoms.
    • Crystals : consist of atoms or molecules arranged in a regular, organised structure.
  • Elements in the Universe
    • All atoms in the Universe are made up of the same particles, the only difference is the number of particles.
    • The number of protons in the nucleos of an atom is the atomic number.
    • Chemical Element is a substance that contains one type of atom, so all atoms have the same atomic number .
  • How are elements classified?
  • Elements and compound substances
    • Chemical Element is a substance that contains one type of atom. It cannot be broken down into anything simpler by chemical reaction..
    • The combination of elements produce millions of compound substances .
    • Each element has its own chemical symbol. To describe molecules a chemical formula is used.